Picker-stick check for looms



Sept. 7, 1926. 1,599,195

A. ARCHER PICKER STICK CHECK FOR LOOMS Filed May 1 1924 i I This invention rel-ates to'looms which cloth is woven with a c fly 'shut-tle, andre-j Patented Sept. .7, 1926.

MASSACHUSETTS.

.nassacsnsnrrs, a co parison on s rens-surest annexnon L-ooixrs.

' Applica ion med May 1,1924. seriaino. 710,457.

l'ates more particularlytothe picking mechanism of this type of, loom. It has-been.

found desirable in suchs'looms :to cushion or yieldingly check the motion of the picker stick Fat "its desired limits of travel and particularly on its return or outwardmovement. I

It is the general object of my inventlon to provide an improved device for thus checking the motion of the picker stick. WVith this general object in view, myinvention in its preferred form provides means for yieldingly returning the picker stick to outward position, in combination with means to limit the extent of such restoring action.

My invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claims.

A preferred form of my invention is shown in the drawings in which- Fig. 1 is a front elevation of parts of a loom embodying my improvement;

Fig. 2 is a partial front elevation showing certain of the parts in Fig. 1 in a different position;

Fig. 3 is a sectional plan view,'taken along the line 33 in Fig. 2,. and

Fig. 4 is an enlarged front elevation of a part to be described.

Referring tothe' drawings, I have shown certain usual parts of a loom including a loom frame or side 10, a'sword 11 mounted on a rock shaft 12, and a lay 18 mounted on the sword and providing a race for a shuttle S, reciprocated by two picker sticks 14, only one of which is shown in the drawings. Each picker stick 14 is connected by, a link 15 to an arm 16 on a pick shaft 17 which is intermittently moved angularly by any usual picking mechanism to advance the picker stick and throw the shuttle across the lay. The picker stick is pivoted at 18 to a bracket or support 19 fixed to the outer end of the rock shaft 12.' A yielding stop 20 is. also pivoted at 21 to the bracket 19 and cushions the picker stick 14 as it approaches its extreme outward position.

The parts thus described are or may be I of the usual form and in themselves constitute no part of my present invention, which relates particularly to means. for

pivoted arm 30 which is yieldingly resisting inward (inoperative thereturn-a'ction. g I I p The mechanism for; -accomplish ng these results comprises an arm 23pivotedat 2 1 on the bracket 19 and connected at its upper end by a flexible strap 25 to the loom side 10. Below its pivot,'the arm 24 is connected "by a strap or, link 26 to a tension spring 27 fixed to an arm adjustably secured to a cross rod 29. lVhilethe details of the yielding stop 20 form no part of my invention, it may be stated that this stop comprises a yieldingly movable outwardagainstthe action of a spring 81 (Fig. 4) and that the arm 30 is provided V movement of the picker stick and thereafter 3 y eldngly returning the stick to its outward "pOSltlQD, together with meansfor limiting.

with a leather band 32 with which the stick let directly engages.

Having described the construction of my invention, the operation thereof is clearly apparent. The picker stick 14, having been swung inward by the picking mechanism, en-

gages the yielding arm 23 and swings the same to the right as viewed in Fig. 1, increasing the tension of the spring 27. wAs soon as the picking mechanism ceases to act and the picker stick is released, the arm 23 exerts yielding pressure to return the picker stick to its outward position.

As the pickerv stick approaches its extreme outward position, however, the effective action of the arm 23 is abruptly stopped by the strap 25, which prevents the arm from following the picker stick beyond a certain predetermined limit.

In its continued outward movement, the stick is cushioned by the yielding stop 20, which exerts a yielding pressure in the opposite direfition from that exerted by the arm 23. T e ingly restored ment.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the detailsherein disclosed otherwise than as set forth in the claims, but what I claim is r 1. In a loom, a picker stick, means to give said picker stick an inward operative move to outward limit of movement, means to yieldingly return said picker stick toward outward position, and a check strap effective to render said restoring means picker stick is thus quickly and yield picker stick inoperative and to thereby limit such restoring action while permitting limited continuous free movement of said picker stick.

2. In a 100m, a picker stick, means to give said picker stick an inward operative movement, means to yieldingly return said picker stick toward outward position, said latter means being operative through-out the major portion of the range of movement of said picker stick, means to render said restoring means inoperative as said picker stick closely approaches its outward position, said having an additional limited free outward movement after said restoring means becomes inoperative, and an additional device effective to -yieldingly resist Vfinaloutward movement of said picker stick.

3. In a 100111, a rock shaft, an end bracket therefor, a picker stick pivoted on said bracket, an arm pivoted on said bracket adjacent said picker stick, a spring to yieldingly force said arm, against said stick, and means to limit such yielding movement of said arm. 7

4. In a 100m, a rock shaft, an end bracket therefor, a picker stick pivoted on said bracket, an arm pivoted on said bracket adjacent said picker stick, a spring to yieldingly force said arm against said stick, and

a flexible member fixed at one end to the outer end of said arm and at the other end to a fixed part of the loom and limiting outward restoring movement of saidarm.

In testimony whereof Ihave hereunto af fixed my signature.

ANDREW ARCHER. 

